Toys, Games and Hobby Products Design Yohocube Cardboard construction set by Yohocube Yohocube cardboard construction kit is an educational toy for kids 6-12 years old and creative adults. Basic elements are cubes and prisms connected with folding fastener. This connection method is unique. International patent application submitted. This connection method differs Yohocube from all other construction kits. Its cardboard details can be securely connected without glue providing the indispensable unity of shape so that the model can be used as a usual toy (tossed, thrown, etc). Some models are strong enough to endure light weight of up to 40 kg and serve as toy furniture.